Codec Comparison: `metric-opt` (-e 7) vs `main` (-e 7) vs `jixel` (ExtraSlow) vs `aom tune=iq` (-s 0)

Corpus: imagecompression.info.rgb8 + jpeg_xl_png (40 pure 8-bit SDR images, unscaled native resolution) | 3 Matching Modes: Bitrate (bpp), Butteraugli 3-norm, SSIMULACRA2 | Hotkeys: 1–5, Space, H, B/U/S, Q/W, C

BD-Rate Range:

Custom: to

metric-opt BD-Rate (BA 3-norm) R3–R9

— vs main — vs rdoq e7 — vs rdoq e8 — vs rdoq e9 — vs jixel — vs aom8b — vs aom10b

metric-opt BD-Rate (SSIMULACRA2) R3–R9

— vs main — vs rdoq e7 — vs rdoq e8 — vs rdoq e9 — vs jixel — vs aom8b — vs aom10b

metric-opt BD-Rate (PSNR) R3–R9

— vs main — vs rdoq e7 — vs rdoq e8 — vs rdoq e9 — vs jixel — vs aom8b — vs aom10b

Active Mode & Tier Corpus Mean

— Tier R8

Corpus Mean Rate–Butteraugli 3-norm Curve (0.20 – 2.00 bpp)

Averaged across all completed images (markers show active matching mode tiers)

⬇ RD SVG ⬇ Matched Δ SVG

metric-opt (cjxl -e 7) main (cjxl -e 7) rdoq -e 7 rdoq -e 8 rdoq -e 9 jixel (Speed::ExtraSlow) aom -s0 tune=iq 8b (4:4:4) aom -s0 tune=iq 10b (4:4:4)

Selected Image Rate–Distortion Curve (main d0.5–d10 range)

Click any tier marker (R1–R10) to jump to that tier; dashed connector links matched points

◆ White ring + connector = active tier in selected matching mode

— —

metric-opt (2)

Crop: 1:1

# / Image	Resolution	BD-Rate BA3 (vs main / jixel / aom8b / aom10b)	BD-Rate SSIM2 (vs main / jixel / aom8b / aom10b)	Active Tier BPP (opt / main / jixel / aom8b / aom10b)	BA 3-norm (opt / main / jixel / aom8b / aom10b)	SSIMULACRA2 (opt / main / jixel / aom8b / aom10b)	PSNR dB (opt / main / jixel / aom8b / aom10b)